20 categories

Practice

The practical mechanics: arithmetic, preparation, handling, administration, and managing what goes wrong.

194 topics10,175 posts48 solved Moderators: bench_notes, KLindqvist About this category

Dosing & titration 35 Reconstitution 33 Administration 33 Storage & stability 30 Side effects 33 Interactions 30

194 topics · page 1 of 7

Topic	Participants	Replies	Views	Activity
About the Reconstitution category Practice › Reconstitution reconstitution concentration maths syringe units Pinned Wiki Diluent choice, volumes, resulting concentrations, worked examples, and the errors we see most often. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is…	+1	5	15k	16h
Angle of injection and whether 90 degrees is always right — the long version Practice › Administration injection site reaction needle gauge & length injection site rotation missed dose Pinned Angle of injection and whether 90 degrees is always right — the long version Writing it up because I had to work it out twice and would rather nobody else did. Reporting something rather than asking about it,…	+50	55	15k	2d
About the Interactions category Practice › Interactions insulin metformin hypoglycaemia Pinned Wiki Drug, supplement and food interactions — separating timing inconveniences from clinically important ones. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is…	+4	8	1.9k	2mo
About the Storage & stability category Practice › Storage & stability storage temperature excursion cold chain Pinned Wiki Refrigeration, excursions, light exposure, freeze-thaw, beyond-use dating, and what published stability data actually covers. This post is a community wiki: any member at trust level 3 or above can edit it,…		4	57k	4mo
About the Dosing & titration category Practice › Dosing & titration titration dose reduction worked example Pinned Wiki Schedules, escalation intervals, dose reductions, and the arithmetic that connects a vial to a syringe mark. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is…		4	350	4mo
About the Administration category Practice › Administration subcutaneous injection injection site rotation needle gauge & length Pinned Wiki Closed Technique, needle selection, site rotation, injection discomfort, and what to do about a missed or partial dose. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit…	+5	9	3.1k	12mo
About the Side effects category Practice › Side effects nausea constipation vomiting Pinned Wiki Closed Recognition, grading, timeline, and management. Adverse events that need urgent attention belong in Safety. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is…		4	7.1k	13mo
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Practice › Administration injection site reaction needle gauge & length aseptic technique injection site rotation Rotating between abdomen, thigh and upper arm: absorption differences — one year on — setting out what I have, and where I think it stops being reliable. I have read the maintained page on this and I still…	+82	102	24k	just now
A widely repeated interaction claim that turns out to be unsupported — what changed since Practice › Interactions insulin hypoglycaemia metformin needs a source Solved A widely repeated interaction claim that turns out to be unsupported — what changed since Writing it up because I had to work it out twice and would rather nobody else did. I have read the maintained page on…	+89	94	5.9k	2h
Leak-back after withdrawal and whether you lost a meaningful dose Practice › Administration missed dose injection site reaction injection site rotation aseptic technique Posting this under the heading it deserves: Leak-back after withdrawal and whether you lost a meaningful dose Everything below is what sits behind that. Reporting something rather than asking about it, in…		2	3k	3h
Sulfonylureas: the interaction most worth taking seriously Practice › Interactions needs a source metformin insulin Sulfonylureas: the interaction most worth taking seriously Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated, because I have seen how…	+4	8	38k	6h
Reconstituting a multi-strength kit without mixing yourself up — what changed since Practice › Reconstitution concentration maths syringe units bacteriostatic water On the subject in the title: Reconstituting a multi-strength kit without mixing yourself up — what changed since Working notes rather than a conclusion. Practical question with the units stated, because I…	+42	46	1k	7h
A site rotation scheme that is easy enough to actually follow — a second dataset Practice › Administration subcutaneous injection needle gauge & length injection site rotation missed dose A site rotation scheme that is easy enough to actually follow — a second dataset Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated,…	+6	10	1.2k	7h
Common supplements people ask about, assessed one at a time Practice › Interactions insulin needs a source hypoglycaemia metformin Common supplements people ask about, assessed one at a time — setting out what I have, and where I think it stops being reliable. A question about technique rather than about dose. I have been doing the same…	+101	107	28k	12h
[2026 update] Antibiotics and a course of something with delayed emptying Practice › Interactions metformin needs a source delayed gastric emptying insulin On the subject in the title: Antibiotics and a course of something with delayed emptying Working notes rather than a conclusion. Reporting something rather than asking about it, in case the pattern is useful…	+88	97	19k	13h
Why side effects reset at each escalation and that is not a failure Practice › Side effects constipation nausea fatigue delayed gastric emptying Solved Why side effects reset at each escalation and that is not a failure — that is the question, and I have not found it answered plainly anywhere I have looked. I have read the maintained page on this and I still…	+3	7	11k	14h
Restarting after a long gap: what the labelling implies Practice › Dosing & titration dose reduction semaglutide titration missed dose Posting this under the heading it deserves: Restarting after a long gap: what the labelling implies Everything below is what sits behind that. I have read the maintained page on this and I still have a gap,…	+41	46	11k	15h
A 10 mg vial reconstituted three different ways, compared Practice › Reconstitution bacteriostatic water worked example concentration maths Posting this under the heading it deserves: A 10 mg vial reconstituted three different ways, compared Everything below is what sits behind that. Practical question with the units stated, because I have seen…	+30	34	55k	17h
Vomiting: when it is expected and when it is a reason to stop — one year on Practice › Side effects nausea vomiting hair shedding Vomiting: when it is expected and when it is a reason to stop — one year on Writing it up because I had to work it out twice and would rather nobody else did. Reporting something rather than asking about it,…	+19	23	49k	18h
When a dose reduction is the correct response to a side effect Practice › Dosing & titration dose reduction tirzepatide titration missed dose Solved When a dose reduction is the correct response to a side effect — that is the question, and I have not found it answered plainly anywhere I have looked. A question about technique rather than about dose. I…	+38	42	2.7k	19h
A site rotation scheme that is easy enough to actually follow Practice › Administration needle gauge & length missed dose injection site rotation aseptic technique On the subject in the title: A site rotation scheme that is easy enough to actually follow Working notes rather than a conclusion. Practical question with the units stated, because I have seen how quickly…	+112	125	5.8k	21h
What steady state means for the decision to escalate Practice › Dosing & titration semaglutide titration tirzepatide missed dose Solved What steady state means for the decision to escalate — that is the question, and I have not found it answered plainly anywhere I have looked. Reporting something rather than asking about it, in case the…	+31	35	2k	1d
Micro-titration: a disputed topic, argued properly — one year on Practice › Dosing & titration dose reduction missed dose semaglutide Posting this under the heading it deserves: Micro-titration: a disputed topic, argued properly — one year on Everything below is what sits behind that. A question about technique rather than about dose. I…	+63	68	35k	1d
Completing a dose with a second syringe, and the dead-volume arithmetic Practice › Administration aseptic technique subcutaneous injection missed dose needle gauge & length Wiki Posting this under the heading it deserves: Completing a dose with a second syringe, and the dead-volume arithmetic Everything below is what sits behind that. I have read the maintained page on this and I…	+65	76	7.4k	1d
Coming back to: Why I now write the concentration on the vial in marker Practice › Reconstitution reconstitution syringe units bacteriostatic water worked example The question in the title: Why I now write the concentration on the vial in marker I will give what I have already checked below so nobody repeats it. Practical question with the units stated, because I have…	+8	12	4.3k	1d
Revisiting: Taste changes and food aversion, reported and discussed Practice › Side effects nausea vomiting constipation Revisiting: Taste changes and food aversion, reported and discussed Writing it up because I had to work it out twice and would rather nobody else did. I have read the maintained page on this and I still have…	+20	25	4.3k	1d
Coming back to: Where the four-week escalation interval comes from, and what it is not Practice › Dosing & titration dose reduction semaglutide titration tirzepatide Solved Posting this under the heading it deserves: Where the four-week escalation interval comes from, and what it is not Everything below is what sits behind that. I have read the maintained page on this and I…	+44	48	11k	1d
How much of the diluent volume the powder itself displaces Practice › Reconstitution concentration maths bacteriostatic water dead volume worked example Asking directly, because I could not find a straight answer: How much of the diluent volume the powder itself displaces Practical question with the units stated, because I have seen how quickly these go wrong…		2	1.8k	1d
Coming back to: Storing in the door of the fridge is worse than you think Practice › Storage & stability temperature excursion cold chain cloudy or discoloured solution Wiki On the subject in the title: Storing in the door of the fridge is worse than you think Working notes rather than a conclusion. I have read the maintained page on this and I still have a gap, so I am asking…	+2	6	2.1k	1d
Hair shedding at month three: mechanism and time course — the long version Practice › Side effects nausea delayed gastric emptying vomiting Hair shedding at month three: mechanism and time course — the long version Writing it up because I had to work it out twice and would rather nobody else did. Reporting something rather than asking about it,…	+50	54	50k	1d

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